Adi belajar pengetahuan sosial selama 3/4 jam.belajar matematika 1 1/2 jam,dan belajar agama 1,5 jam.berapa jam adi belajar ilmu pengetahuan sosial ,matematika,

IPS = 3/4 Jam
MTK = 11/2 Jam
Agama = 1,5 jam
= 15/10 jam
= 3/2 Jam
Jumlah = IPS + MTK + AGAMA
= 3/4 + 11/2 + 3/2
= 3/4 + 22/4 + 6/4
= 31/4
= 7 3/4 jam

3/4 Jam = 3/4 × 60 = 60 : 4 = 15 × 3 = 45 Menit
1 1/2 Jam = 1,5 Jam = 1 Jam 30 Menit
1,5 Jam = 1 Jam 30 Menit
00.45 + 01.30 + 01.30 = 02.15 + 01.30 = 03.45 = 3 3/4 Jam = 3 Jam 45 Menit